2840240

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{2731}}^1$

素因数の和:2757

約数の個数: 40

約数和(自身を含む): 7114128

約数和(自身を除く): 4273888

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 2731, 5462, 10924, 13655, 21848, 27310, 35503, 43696, 54620, 71006, 109240, 142012, 177515, 218480, 284024, 355030, 568048, 710060, 1420120, 2840240]

約数ペア:

[(1, 2840240), (2, 1420120), (4, 710060), (5, 568048), (8, 355030), (10, 284024), (13, 218480), (16, 177515), (20, 142012), (26, 109240), (40, 71006), (52, 54620), (65, 43696), (80, 35503), (104, 27310), (130, 21848), (208, 13655), (260, 10924), (520, 5462), (1040, 2731)]